Pneumatech HTM02-01, Operation And Maintenance Manual

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Installation, Operation and Maintenance Manual
Medical Vacuum Plant Page 55
Causes and remedies
The flow demand in vacuum can not be sustained. One of the following causes could lead to this
alarm:
1. The plant is not properly sized to meet the flow demand. Conduct a flow test and consult
Pneumatech MGS.
2. A ball valve is not in the correct position. Check all valve positions (see section Setting the
pneumatic system).
3. One or more pumps are not performing to their full capacity. Check that maintenance is
carried out as required according to section Checks and intervals and that the drawn current
on the amp meter (see section Interface icons and menu structure) corresponds to the values
found in section Fuse values and as written in the logbook during commissioning.
4. The pressure drop over the bacterial filters exceeds 100 mbar. Carry out maintenance (see
section Bacterial filter replacement).
5. A leak or rupture is present in the piping, hoses, vessels, filters or pumps. Investigate the
plant for leaks.
When a leak or rupture is found in a section which can be isolated from the main flow, remedy
the problem after isolating the section (for spare parts, consult the spare part list).
When the leak or rupture is situated in the main flow pipeline of the plant and cannot be
isolated, please contact Pneumatech MGS.
6. The piping, hoses or inlets of the pumps are blocked. When a blockage is found in a section
which can be isolated from the main flow, remedy the problem after isolating the section (for
spare parts, consult the spare part list).
When the blockage is situated in the main flow pipeline of the plant and cannot be isolated,
please contact Pneumatech MGS.
7. A non-return valve of a pump (situated upstream of the FTGOL switch) is locked in closed
position. Pump by pump, verify if there is an impact on the pressure between the pump
running and not running (Contact Pneumatech MGS).
If there is no impact, order a non-return valve service kit (consult the spare parts list) and
proceed to replacing the non-return valve according to section Non-return valve and inlet
screen replacement.
8.4.4
Pressure fault
Description
The net pressure exceeds -480 mbar(e) (-360 mmHg).
Evidently, this situation requires immediate attention.
Figure 8-37; Controller alarms and faults – Pressure Fault
Causes and remedies
This situation is the escalation of the Plant emergency alarm above, and the same causes and
remedies apply.